Roseanne's Tweet was abhorrently raciest, and is NOT equivalent to using foul language.
"Roseanne Barr isn’t new to incendiary tweets. Here’s why ABC decided to act" PBS NewsHour 5/29/2018
SUMMARY: ABC canceled rebooted sitcom "Roseanne" on Tuesday over an offensive outburst by its creator and star. Roseanne Barr wrote a racist tweet about Valerie Jarrett, a former senior advisor to President Obama. William Brangham talks with Eric Deggans of NPR about ABC parting ways with what had become one of its most successful shows.